I'll be receiving a refund for taxes paid (in 2018) for 2017. As of Feb. 2019, I've not yet received it. So how will I eventually enter the data into TurboTax-2019 ?

The state sent me a letter in Dec. 2018, telling me about this refund.  They have now already sent a "2018 Statement of Interest" (a small amount) that they're going to pay me - again, $$ not yet received.  In working with TurboTax 2018, I don't see how you enter a state tax refund amount for any but just the prior tax year.